GRCs DNS Benchmark - DNS Nameserver Performance Benchmark
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Public DNS Server Tool - Public DNS Server Tool is a small utility for changing the DNS servers in Windows XP, Vista, 7 and...
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
namebench - Provides personalized DNS server recommendations based on your browsing history.
Prometheus - An open-source systems monitoring and alerting toolkit.